/**
 * @description 绑定事件 on(element, event, handler)
 */
export const on = (function () {
    if (document.addEventListener) {
      return function (element, event, handler) {
        if (element && event && handler) {
          element.addEventListener(event, handler, false)
        }
      }
    } else {
      return function (element, event, handler) {
        if (element && event && handler) {
          element.attachEvent('on' + event, handler)
        }
      }
    }
})()
  
/**
 * @description 解绑事件 off(element, event, handler)
 */
export const off = (function () {
if (document.removeEventListener) {
    return function (element, event, handler) {
    if (element && event) {
        element.removeEventListener(event, handler, false)
    }
    }
} else {
    return function (element, event, handler) {
    if (element && event) {
        element.detachEvent('on' + event, handler)
    }
    }
}
})()